DCUO problems please help.

I went on my Mac and added DCUO to my Xbkx account from there. On my Xbox it doesn't show up at all and I can't find it on the store until I found the store page while someone else was playing it.

DCUO doesn't show up on my Xbox under my games but on the comp it says I already own it. Whenever I press launch game it sends me to the store page and there's no "play" option on it.